<?php
/**
 * $Id: tiny_mce_gzip.php 198 2007-02-12 14:10:07Z spocke $
 *
 * @author Moxiecode
 * @copyright Copyright й 2005-2006, Moxiecode Systems AB, All rights reserved.
 *
 * This file compresses the TinyMCE JavaScript using GZip and
 * enables the browser to do two requests instead of one for each .js file.
 * Notice: This script defaults the button_tile_map option to true for extra performance.
 */

// Set the error reporting to minimal.
@error_reporting(E_ERROR | E_WARNING | E_PARSE);

// Get input
$plugins = explode(',', getParam("plugins", ""));
$languages = explode(',', getParam("languages", ""));
$themes = explode(',', getParam("themes", ""));
$diskCache = getParam("diskcache", "") == "true";
$isJS = getParam("js", "") == "true";
$compress = getParam("compress", "true") == "true";
$suffix = getParam("suffix", "_src") == "_src" ? "_src" : "";
$cachePath = realpath("."); // Cache path, this is where the .gz files will be stored
$expiresOffset = 3600 * 24 * 10; // Cache for 10 days in browser cache
$content = "";
$encodings = array();
$supportsGzip = false;
$enc = "";
$cacheKey = "";

// Custom extra javascripts to pack
$custom = array(/*
		"some custom .js file",
		"some custom .js file"
		*/);

// Headers
header("Content-type: text/javascript");
header("Vary: Accept-Encoding");  // Handle proxies
header("Expires: " . gmdate("D, d M Y H:i:s", time() + $expiresOffset) . " GMT");

// Is called directly then auto init with default settings
if (!$isJS) {
	echo getFileContents("tiny_mce_gzip.js");
	echo "tinyMCE_GZ.init({});";
	die();
}

// Setup cache info
if ($diskCache) {
	if (!$cachePath)
		die("alert('Real path failed.');");

	$cacheKey = getParam("plugins", "") . getParam("languages", "") . getParam("themes", "") . $suffix;

	foreach ($custom as $file)
		$cacheKey .= $file;

	$cacheKey = md5($cacheKey);

	if ($compress)
		$cacheFile = $cachePath . "/tiny_mce_" . $cacheKey . ".gz";
	else
		$cacheFile = $cachePath . "/tiny_mce_" . $cacheKey . ".js";
}

// Check if it supports gzip
if (isset($_SERVER['HTTP_ACCEPT_ENCODING']))
	$encodings = explode(',', strtolower(preg_replace("/\s+/", "", $_SERVER['HTTP_ACCEPT_ENCODING'])));

if ((in_array('gzip', $encodings) || in_array('x-gzip', $encodings) || isset($_SERVER['---------------'])) && function_exists('ob_gzhandler') && !ini_get('zlib.output_compression')) {
	$enc = in_array('x-gzip', $encodings) ? "x-gzip" : "gzip";
	$supportsGzip = true;
}

// Use cached file disk cache
if ($diskCache && $supportsGzip && file_exists($cacheFile)) {
	if ($compress)
		header("Content-Encoding: " . $enc);

	echo getFileContents($cacheFile);
	die();
}

// Add core
$content .= getFileContents("tiny_mce" . $suffix . ".js");

// Patch loading functions
$content .= "tinyMCE_GZ.start();";

// Add core languages
foreach ($languages as $lang)
	$content .= getFileContents("langs/" . $lang . ".js");

// Add themes
foreach ($themes as $theme) {
	$content .= getFileContents( "themes/" . $theme . "/editor_template" . $suffix . ".js");

	foreach ($languages as $lang)
		$content .= getFileContents("themes/" . $theme . "/langs/" . $lang . ".js");
}

// Add plugins
foreach ($plugins as $plugin) {
	$content .= getFileContents("plugins/" . $plugin . "/editor_plugin" . $suffix . ".js");

	foreach ($languages as $lang)
		$content .= getFileContents("plugins/" . $plugin . "/langs/" . $lang . ".js");
}

// Add custom files
foreach ($custom as $file)
	$content .= getFileContents($file);

// Restore loading functions
$content .= "tinyMCE_GZ.end();";

// Generate GZIP'd content
if ($supportsGzip) {
	if ($compress) {
		header("Content-Encoding: " . $enc);
		$cacheData = gzencode($content, 9, FORCE_GZIP);
	} else
		$cacheData = $content;

	// Write gz file
	if ($diskCache && $cacheKey != "")
		putFileContents($cacheFile, $cacheData);

	// Stream to client
	echo $cacheData;
} else {
	// Stream uncompressed content
	echo $content;
}

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

function getParam($name, $def = false) {
	if (!isset($_GET[$name]))
		return $def;

	return preg_replace("/[^0-9a-z\-_,]+/i", "", $_GET[$name]); // Remove anything but 0-9,a-z,-_
}

function getFileContents($path) {
	$path = realpath($path);

	if (!$path || !@is_file($path))
		return "";

	if (function_exists("file_get_contents"))
		return @file_get_contents($path);

	$content = "";
	$fp = @fopen($path, "r");
	if (!$fp)
		return "";

	while (!feof($fp))
		$content .= fgets($fp);

	fclose($fp);

	return $content;
}

function putFileContents($path, $content) {
	if (function_exists("file_put_contents"))
		return @file_put_contents($path, $content);

	$fp = @fopen($path, "wb");
	if ($fp) {
		fwrite($fp, $content);
		fclose($fp);
	}
	return true;
}
?>